How to send a message without a cell phone signal?

Messages sent by the other party during the shutdown of the mobile phone can be received as long as the signal returns to normal within 48 hours.

When the mobile phone has no service, no signal or is turned off, but the mobile phone must be in a state of non-arrears, the three major operators automatically save the last received SMS for 48 hours by default. After more than 48 hours, the mobile phone will automatically receive a signal or turn it on. If the network is busy, there may be a delay in sending.

Extended data:

After the short message is sent, if the other party's mobile phone is turned off, the short message will only be stored in the server of the short message service center for 48 hours, and will be automatically deleted after the time limit is exceeded. In addition, the mobile phone can't receive SMS for the following reasons:

1. Please check whether the mailbox is full first. If yes, please delete some information.

2. If you still can't get it after deleting it, you can change the machine or card to see if it is a hardware factor.

3. After eliminating the above reasons, you can try to test whether it can be received in other places to see if it is the reason for the weak local signal. ? If none of the above problems exist, it may be related to the network function, please contact the local manual customer service to deal with this problem.